And now it turns out the store is also extremely expensive - both to build, and to maintain. Originally it was built with 90 individual glass panels, but a $6.7 million dollar renovation in 2011 took that down to just 15. And now one of the cube's 15 glass panels has been smashed during a snowstorm - and it's estimated to cost more than $450,000 to replace.

Reports suggest that the glass panel was smashed by a snow blower which crashed into the side.